Dash-pot.



c. H. HAPGooD. l

DASH POT.

APPLICATION FILED NOV-6.1915.

Patented Oct. 8, 1918.

#fram/fr sli CLARENCE E. HAPGOOD, 0F TOLEDO, OHIG, ASSIGNOR TO TOLEDOSCALE COMPANY, OF TOLEDO, 01H10, A CORPORAJIION 0F NEW JERSEY.

nnen-Por.

Application filed November 6, 1915.

To all whom it may Concern.'

Beit known that l, CLARENCE H. HAP- Goon, a citizen of the `UnitedSta-tes, residing at Toledo, in the county of `Lucas and State of Uhio,have invented certain new and useful `llmprovements in Dash-Pots, ofwhich the following is a specification.

My invention relates to dash-pots or similar shock-absorbing devices,and is particularly designed for use in automatic Weighing scales. lt isdesirable to dampen and regulate the movement of the main beam and levermechanismof an automatic weighing scale so as to prevent thetransmission 'of shock from the commodity receiver to theload-counterbalancing mechanism, even though the commodity being weighedhe placed upon the receiver care essly or with intentional violence.'lhe dash-pot which forms the subject matter of the present applicationis particularly adapted to accomplish this regulation of the movement ofthe beam and lever mechanism of an automatic scale, though obviously itmay be used in other connections where similar regulation is to be:eected, and certain oits principles and features are applicable todash-pots in general, as will more fully appear from the followingdetailed description of a preferred embodiment of my inventionillustrated in the accompanying drawings. As will appear, my inventioninvolves an improved form of dasher or piston in which the damping eectmay be readily controlled by manual adjustment while also susceptible toan automatic regulation in ac-` cordance with the violence or speed ofmovement to which it is subjected. A, further feature of my inventionconsists in providing a splash plate limited in its movement andarranged to prevent the pumping or splashing of oil upwardly in such voume and with such velocity as to cause it to overflow or splash out ofthe dash-pot.

With the above and other objects in view, which will readily appear asthe invention is better understood, my invention consists in the novelconstruction, combination and arrangement of parts to be hereinaftermore fully described and particularly pointed out in the suhjoinedclaims.

Reference is to be had to the accompanying drawings illustrating apreferred embodiment of my invention and wherein similar referencenumerals designate similar parte throughout the several views.

Specification of Letters Patent.

Patented Get. Ii9l8.

Serial No. 59,923.

In the drawings r Figure l is a side elevation with parts in section ofa weighing scale equipped with a dash-pot embodying my invention.

Fig. 2 is an enlarged detail sectional view 0l1 the piston andassociated parts, and

Fig. 3 is a plan view of the splasher late.

lt will not be necessary to give a retail description of the particulartype of weighing scale here chosen for the purpose of illustrating thepreferred embodiment of my invention, because that type of scale is wellknown through extensive commercial use, and is described in detail in myPatent No. 1,l.66,128, issued December 28, 1915, of which tlnsapplication is in part a continuation. Inasmuch as the present inventionis not dependent for its operation upon any particular form of scalemechanism, no attempt is made in this application to show a completescale mechanism, nor to delineate the action of the scale in itsload-counterbalancing or weighing operations; only so much of the scalemechanism being shown as is necessary to clearly portray the operationand co-action of the scale mechanism with the features forming theclaimed invention herein disclosed. l

Referring to the drawings, 5 designates a suitable scale basecarryingstandards 6 on which is fulcrumed a scale beam 7 supporting a. scale panor other commodity receiver 8 and connected Within a housing 9 with apendulum load-counterbalancing mechanism (not shown) which lis soconnected and arranged as to swing in a vertical plane to a positiono'setting the weight of a commodity placed upon the scale pan 8. Thescale pan 8 preferably consists of the usual casting 10 supporting adisk 11 of lass or other suitable materia-l clamped in p ace by means ofa thumb screw l2 and resting upon supports 13 of rubber or othersuitable material. To maintain the scale pan in'substantialllyhorizontal position, the casting is provided with a depending check-rod14:, the lower end of which is pivotally connected Within the lbase 5with a check-link (not shown) of any approved type. The casting 10 suporting the scale pan rests uponrthe scale eam 7 inwardly of the fulcrumpivots, andthe weight of a commodity placed upon the scale pan will tendto move -the inner end of the scale beam downwardly. A rackrod (notshown) is suitably connected with the scale beam within the housing 9:.the

` pivotally connected at its upper extremity,

Laeonao rack thereof meshing with a pinion suitably Wardly from theposition shown in Fig. 1, mounted upon a shaft carrying the rotary theliquid in the da-sh-pot cylinder being cylindrical chart on which ispreferably inforced through apertures in the plunger 21 scribed figuresindicating weights and comand under the peripheral edge of the bellputations at various prices per unit of 26, the rapidity of movement ofthe plunger weight. The features just referred to are being governed bythe position of the bell common and well known in the scale art and Withrelation to the upper face of the plunneed not be herein s ecicallydescribed. ger. To adjust thev position of the bell it is My dash-potconsists o a cylinder 15 having only necessary to loosen the lockingscrew an enlarged upper portion 15a extending 31 and rotate the' sleeve30 and the attached through an opening in the top of the base 5 nut 29.Rotation of the sleeve in one direcand secured to said base by means ofset tion will serve to force the bell 26 toward the screws passingthrough apertures in a flange plunger 21 against the tension of the coil16 carried lby the cylinder (see Fig. 1). A spring 27, While rotation ofthe sleeve 30 in cap 17 is preferably threaded upon the upper theopposite direction permits the coil spring extremity of the cylinder 15and is formed 27 to move the bell 26 and the spacing sleeve with anenlarged central aperture through 28 upwardly or away from the ,plunger2l. which-extends an elongated sleeve 18 adaptllVhen the desiredadjustment has been made ed to project for some distance on both sidesthe locking screw 3l is again turned to lockof the' cap or cover 17 toassist in preventing position. When the commodity is reing theaccidental splashing of the oil from moved from the scale pan the fallof the the cylinder. A perforated splasher plate pendulum toitsoriginal'position will serve 19 is also provided for the prevention ofthe to raise the inner end of the scale beam and pumping or splashing ofoil from the cylinthe plunger rod 20, the liquid in the dashder, and isarranged to rest upon a shoullpot passing under the edge of the bell 26and der 15h formed in the cylinder 15 by the enthrcugh the apertures inthe piston. largement 15", and is limited in its upward While it will beapparent from the above movement by the lower extremity of thedescription that the illustrated embodiment sleeve 18, which is arrangedto extend into of my invention is well calculated to adejuxtaposition tothe splasher plate. quately fulfil the objects of the invention Theplunger rod or stem 20 is preferably primarily stated, it will beunderstood that of smaller diameter than the sleeve 18-to theconstruction shown is susceptible to allow limited lateral or swingingmovements modification, variation and change without of the plunger 21,and is provided with departing from the spirit and scope of thescrew-threads at its upper extremity adapted invention as set forth inthe subjoined y100 to fit into a" threaded aperture in the cap claims.plate 22 (see Fig. 2). The cap plate 22 is Having described myinvention, I claim: 1. In a dash-pot, a cylinder containing as at 23, tothe bracket arm 24 which is seliquid, a reciprocating plunger andplunger cured to the main beam 7 by the set screwf25. rod, and a splashplate surrounding the 105 or other suitable means. The plunger orpisplunger rod above the level of the liquidin ton 21 consistsof aIperforated disk above the dash-pot. which is positioned an adjustablebell 2.6 of 2. In a dash-pot, a cylinder containing smaller diameterthan the cylinder and liquid, a reciprocating plunger and plungerloosely encircling the plunger rod 20, a coil rod, and a perforatedsplash plate loosely 110 spring 27 being arranged between the bellsurrounding the plunger rod above the level andfplunger, as clearlyshown in Fig. 2. of the liquid in the dash-pot. n A`n elongated sleeve28, the lower end of 3..In `a'dash-pot, a cylinder adapted tu whichrests uponthe bell 26, surrounds the contain liquid and having ashoulder above plunger rod 20 and the upper end of said -the level ofthe liquid, a reciprocating plun- 11b sleeve is contacted by anadjusting nut 29 ger and plunger rod, and a splash plate surthreadedupon the upper extremity of the rounding the plunger rod and restingupon plunger rod 20. A sleevel30 is secured to the shoulder. 4 theperiphery of the nut 29 to facilitate the 4. In a dash-pot, a cylinder,a plunger rod', rotation of this nut and render it accessible a pistonsecured thereto, a bell loosely sur- 120 for manual adjustment withoutthe necesrounding the plunger rod, resilient means sity of employing aninstrument. A locking for spacing the bell from the piston, adjustscrew31 is threaded into the cap plate 22 ing means coperating with saidresilient and contacts with the sleeve 30 to hold the means forpositioning the bell with relation nut 29 1n any adjusted position(seeFig. 2).l to the piston, including a sleeve contacting 1.l2i5

In the operationof the scale, Whenever a the bell, and means for movingthe sleeve load is placed upon the scale pan 8 the inner longitudinallyof the plunger rod. end of the scale beam 7 is depressed, rais- 5. Adash-pot comprising a cylinder, a ing the pendulum mechanism and forcingpiston, a plunger rod secured to the piston the plunger rod 20 of thedash-pot downand provided with screw-threads, a bell sur- 180 roundingthe plunger rod, and means for adjusting the position of the bellrelatively to the piston, including a sleeve loosely surrounding theplunger rod and engaging the bell, and an adjusting nut threaded uponthe plunger rod and contacting said sleeve.

6. A dash-pot comprising a cylinder, a piston, a plunger rod secured tothe piston and provided with screw-threads, a bell surrounding theplunger rod, and means for adjusting the position of the bell relativelyto the piston, including a sleeve loosely surrounding the plunger rodand engaging the bell, an adjusting nut threaded upon the plunger rodand contacting said sleeve, and resilient means arranged between thepiston and the bell and engaging the latter.`

7. A dash-pot comprising a cylinder having a lower portion adapted tocontain liquid and an upper portion of greater diameter than the lowerportion providing a shoulder between the two portions, a piston, aplunger rod secured tnereto, a bell surrounding the plunger rod andspaced from the piston,

means for adjusting the position of the bell plate loosely surroundingsaid sleeve and resting upon the shoulder of the cylinder.

8. In a device of the class described,y a movable element and a fixedelement, a dash pot secured to the fixed element, a cover thereforhaving an upwardly-extending sleeve, a plunger within the dash pot, aplunger rod connecting the plunger to the movable element, and a sleeveupon the plunger rod closed at its upper end and surrounding the sleeveupon the dash pot cover.

CLARENCE H. HAPGooD.

Witness:

